Apparatus and method for receiving television and radio broadcasting signals using a single tuner

Abstract

There is provided a combined TV and FM radio receiver for selectively receiving TV and FM radio signals via a single tuner using a digital intermediate frequency (IF) stage. The receiver includes a tuner that selects TV band or FM radio band signals and converts the selected signals into IF signals or primary sound IF signals; an IF processor that generates local oscillating signals depending on whether a current mode is a TV mode or an FM radio mode, and converts the IF signals and / or primary sound IF signals, into baseband signals and secondary sound IF signals, respectively; a video demodulator that extracts video signals; an audio demodulator that extracts TV audio signals and FM radio signals according to TV sound or FM radio mode data; and a controller that controls the tuner, and the IF processor, and applies the TV sound or FM radio mode data to the audio demodulator.

Description

BACKGROUND OF THE INVENTION[0001]This application claims the priority of Korean Patent Application No. 2002-67397, filed on Nov. 1, 2002, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.[0002]1. Field of the Invention[0003]The present invention relates to a combined TV (television) and FM (frequency modulation) radio receiver and a method to receive TV and FM radio signals, and more particularly, to a combined TV and FM radio receiver capable of, and a method for, selectively receiving TV and FM radio signals via a single tuner using a digital IF (intermediate frequency) stage.[0004]2. Description of the Related Art[0005]A TV receiver for receiving broadcasting signals, e.g., TV signals and FM radio signals, transmitted in different frequency bands typically includes a plurality of tuners in correspondence with the respective frequency bands and a plurality of detection circuits for detecting signals selected vi...

AI Technical Summary

Benefits of technology

The present invention provides a combined TV and FM radio receiver that can receive both TV and FM signals with a single unit. This reduces production costs and improves usability. The receiver includes a tuner, an IF processor, a video demodulator, an audio demodulator, and a controller. The tuner selects and converts signals, the IF processor generates different local oscillating signals for TV and FM modes, and the video demodulator extracts video signals. The audio demodulator extracts either TV or FM audio signals, depending on the mode selection. The controller controls the tuner and the IF processor based on the mode selection data. The technical effect of this invention is a more cost-effective and versatile combined TV and FM radio receiver.

Problems solved by technology

Accordingly, the structure of the conventional receiver is complex and the production cost thereof is high.

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